GPT-5.5 Pro vs Claude Opus 4.8 — Premium AI Model Pricing 2026
GPT-5.5 Pro costs 6x more than Claude Opus 4.8. Both offer 1M+ context windows for premium AI tasks.
Pricing data verified: Jun 9, 2026
All Premium Models Compared
Premium and mid-tier AI models from major providers, ranked by input price.
| Model | Provider | Tier | Input (per 1M) | Output (per 1M) | Context |
|---|---|---|---|---|---|
| GPT-5 | OpenAI | Budget | $2.50 | $10.00 | 272K |
| Claude Sonnet 4.6 | Anthropic | Budget | $3.00 | $15.00 | 200K |
| Gemini 3.1 Pro | Budget | $3.50 | $10.50 | 1M | |
| Claude Opus 4.8 | Anthropic | Premium | $5.00 | $25.00 | 1M |
| GPT-5.3 Codex | OpenAI | Premium | $8.00 | $32.00 | 512K |
| Kimi K2.6 | Moonshot | Premium | $10.00 | $30.00 | 128K |
| Gemini 3.5 Flash | Premium | $12.00 | $36.00 | 1M | |
| GPT-5.5 | OpenAI | Premium | $15.00 | $60.00 | 512K |
| GPT-5.5 Pro | OpenAI | Premium | $30.00 | $180.00 | 1.05M |
Calculate Your Exact Costs
Pick your models, enter your usage, see how much you'd save with Claude Opus 4.8 over GPT-5.5 Pro.
Which Should You Choose?
Chatbot / Customer Support
High volume, short responses. Cost per message matters most. Both offer 1M+ context for long conversations, but pricing differences are extreme.
Code Generation
Complex reasoning, longer outputs. Quality and accuracy matter. Both handle most coding tasks well, but cost scales fast with GPT-5.5 Pro's output pricing.
Complex Reasoning / Enterprise
Tasks requiring deep reasoning, multi-step logic, or enterprise-grade reliability. Both are top-tier for complex work.
Long Document Analysis
Processing large documents, legal contracts, or entire codebases. Context window is critical.
Startup MVP
Minimize costs while building with premium capabilities. Need reliable API without breaking the budget.
High-Volume Processing
Classification, extraction, summarization at scale. Budget is the primary concern at millions of tokens per day.
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Frequently Asked Questions
Is GPT-5.5 Pro worth the price over Claude Opus 4.8?
It depends on your use case. GPT-5.5 Pro at $30/$180 per 1M tokens is 6x more expensive than Claude Opus 4.8 at $5/$25. GPT-5.5 Pro may offer advantages for specific OpenAI ecosystem integrations and certain specialized tasks, but for most premium AI workloads, Claude Opus 4.8 delivers comparable quality at 83% less on input and 86% less on output. At 10M tokens/month, GPT-5.5 Pro costs $2,100 vs Claude Opus 4.8's $300 — saving $1,800/month.
What does GPT-5.5 Pro offer that Claude Opus 4.8 doesn't?
GPT-5.5 Pro offers a slightly larger context window (1.05M vs 1M tokens) and deeper integration with OpenAI's ecosystem including plugins, Assistants API, and fine-tuning capabilities. It also has a 120K output token limit per request. However, these advantages come at a 6x price premium. For most tasks — reasoning, coding, analysis, and content generation — Claude Opus 4.8 performs comparably at a fraction of the cost.
Which has a larger context window?
GPT-5.5 Pro has a slightly larger context window at 1.05 million tokens compared to Claude Opus 4.8's 1 million tokens. The 50K token difference is marginal — both models can handle extremely long documents, large codebases, and extended conversation histories. For the vast majority of use cases, the 1M context of Claude Opus 4.8 is more than sufficient, making GPT-5.5 Pro's 5% larger window hard to justify at 6x the price.
When should I use GPT-5.5 Pro over Claude Opus 4.8?
Consider GPT-5.5 Pro when you specifically need OpenAI ecosystem features (plugins, Assistants API, fine-tuning), when you need the full 1.05M context window, or when OpenAI's model architecture produces measurably better results for your specific task. For most premium workloads — complex reasoning, code generation, long document analysis — Claude Opus 4.8 at $5/$25 delivers equivalent quality at 83-86% lower cost.
What is the cheapest alternative to GPT-5.5 Pro?
Claude Opus 4.8 at $5/$25 is the cheapest premium-tier alternative to GPT-5.5 Pro ($30/$180), offering 83% cheaper input and 86% cheaper output with a nearly identical 1M context window. For even more savings, GPT-5.5 at $5/$30 matches Claude Opus 4.8 on input pricing. On the budget end, DeepSeek V4 Pro at $0.435/$0.87 provides 1M context at 98% lower cost than GPT-5.5 Pro.